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Nanostructured thin-film tungsten trioxide photoanodes for solar water and sea-water splitting

Published inProceedings of SPIE-The International Society for Optical Engineering, vol. 6340, Editors The International Society for Optical Engineering, p. 9
Presented at San Diego (USA), 14.08.2006
Publication date2006
Abstract

About 3 μm thick tungsten trioxide film electrodes consisting of partly sintered, 40-80 nm in diameter, particles deposited on conducting glass substrates exhibit high photon-to-current conversion efficiencies for the photooxidation of water, exceeding 70% at 400 nm. This is facilitated by a ca. 40% film porosity resulting in high contact area with the electrolyte. It is shown that the activity of the WO3 electrodes towards photooxidation of water is enhanced by addition of even small amounts of halide (Cl-, Br-) ions to the acidic electrolyte. Photoelectrolysis experiments performed either in acidic electrolytes containing chloride or bromide anions or in a 0.5 M NaCl solution, under simulated 1.5 AM solar illumination, demonstrated long term stability of the photocurrents. Oxygen remains the main product of the photoanodic reaction even in a

Keywords
  • Metal-oxide semiconductor
  • WO3 photoanode
  • Nanostructured film
  • Photoelectrolysis of water
  • Sea water
  • Visible light
NoteConference title : Solar Hydrogen and Nanotechnology
Citation (ISO format)
AUGUSTYNSKI, Jan et al. Nanostructured thin-film tungsten trioxide photoanodes for solar water and sea-water splitting. In: Proceedings of SPIE-The International Society for Optical Engineering, vol. 6340. San Diego (USA). [s.l.] : [s.n.], 2006. p. 9. doi: 10.1117/12.680667
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